What do you hear about huge investments in cryptocurrency? What motivates billionaires to invest millions in BTC?

The fact they can make easy and fast money thanks to the cryptocurrency volatility. As well, BTC market is relatively small in comparison to alternatives, so then it is easier for them to change the trend with just a couple of relatively small (for them) transactions.
This is what you could have seen with online Bitcoin price charts. Just this week.
Everyone was saying that charts were bullish.
Yet everything is in red.